Furnace



Dec. 17, 1929. 'A. o. HANSEN f 1,739,836

FURNACE Filed Aug. 2, 1,927 2 sheets sheet 1 A TTORNEYS.

Dec. 17, 1929.

A.O.HANSEN FURNACE Filed Aug. 2, 1927 2 Sheets-Sheet 2 ATTORNEY PatentedDec. 17, 1929 warren stares PATENT OFFECE AUGUST OLA]? HANSEN, OF NEWYORK, N. Y., ASSIGNOR TO INTERNATIONAL COMBUS- 'lION ENGINEERINGCORPORATION, OF NEW YORK, N. Y., A. CORPORATION OF DELA- WAREApplication filed August 2, 1927. Serial No. 210,056.

My invention relates to furnaces and has special reference to fuelfeeding rams for casing,

furnaces.

An object of the invention is to provide a novel and improved fuelfeeding ram.

Another object of the invention is to provide a device of this characterwhich may be easily controlled to vary the fuel feeding action thereof.I

. The several features of the invention, whereby the above mentioned andother objects may be attained, will be clearly understood from thefollowing description and accompanying drawings, in which:

Figure 1 is a side elevation, partly in section, of a portion of afurnace embodying the features of the invention in their preferred form;

Fig. 2 is a sectional plan view on an enlarged scale taken on the line22 of Fig. 1;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a view corresponding to Fig. 3, but showing parts of the ramin a difierent posi' tion;

Fi 5 is a transverse sectional view taken on the line 5-5 of Fig. 3; and

Fig. 6 is a detail view in perspective of a component part of thecontrolling mechanism of the ram.

The furnace illustrated in Fig. 1 of the drawings, is provided with acombustion chamber 2, a fuel hopper 4, a fuel pushing ram 6 for feedingthe fuel into the combustion chamber of the furnace, a ram casing 8having an inlet opening 10 through which fuel from the hopper may passinto the ram and a motor shaft 12 and suitable connections comprising aconnecting rod 14, hav' ing one end connected with the ram, forreciprocating the ram. V

Except as hereinafter described, the parts above referred to may be andpreferably are of a well known construction.

-In,accordancc with myinvention the fuel feeding ram 6 is made in twosections 16 and 18 that extend longitudinally and are arranged one uponthe other. The upper section 16 is connected by a wrist pin 20 with theconnecting rod 14 so as to be reciprocated thereby. The two sections ofthe ram are adapted to be connected and disconnected. When they areconnected they reciprocate to-. gether, and thus effect the maximumfeeding of the fuel. When they are disconnected the lower section isheld stationary and serves as a support on which the upper sectionslides,

of the free end of the pawl 22 is limited by means of a stop lug 28thereon which engages a lug 30 on the upper ram section 16. When the ramsections 16 and 18 are connected, the tooth 32 of the pawl engages therear side of a latch block 34 formed on a locking bar 36 which ismounted to slide in a suitable guideway 38 in the lower ram section 18.The rear portion of the lower ram section 18 is provided with a coredout upwardly opening recess 21 for receiving't-he pawl 22. The pawl 22by engagement with the rear side of the latch block 34 causes the lowersection of the ram 18 to move with the upper section during theretracting movement of the latter section. The lower section is causedto move with the upper section during the feeding movement thereof, bymeans of a shoulder 40 on the upper section that engages a shoulder 42on the lower section. Thus, it will be apparent when the pawl 22 is inlooking engagement with the block 34 that the lower ram section will beconnected to move with the upper section during both the retracting andfuel feeding movements of the upper section. The ends of the locking bar36 extend through clearance slots 44 in the ram casing 8 and one end ofthe bar is provided with a handle 46 by means of which the bar may bepulled outwardly a suflicient distance to withdraw the latch block 34from beneath the locking pawl 22 whereupon the lower ram section will bedisconnected from the upper section. The outward movement of thelockstop pin'4;8.on the end of the bar oppositet-he 1 handle 46*with thecorresponding side of the lower ram section18.

v To connect the lower ram'section 18 with the up er section, thelocking bar 36 is ushed inwardly until the inner end of the late block34 engages one side wall of the recess 21 which positions the latchblock in the path of the free end of the locking pawl 22, whereupon,

during the next feeding movement of the upper ram section, the end ofthe pawl will ride up over an inclined surface 52 on the block 34 so asto permit the tooth on the pawl 5 to drop down into latching positionover the rear side of the block.

It may be noted that the locking-bar 36 may be shifted longitudinally toconnect and disconnect the two ram sections during the 0 fuel feedinmovement of the upper section. Also, that the engagement of thecooperating shoulders 40 and 42 during said movement of the uppersection will advance the lower section to its innermost position whichis directly beneath the inlet opening 10 in the ram casing. The lowersection is held from further inward movement by the engagement of theends of the locking bar 36 with-the rear end walls of the slots'44through which they 30, extend. With the lower section thus positionedall of the fuel thereafter entering the ram casing will drop down uponthe top surface of the lower section and be fed into the furnace by theupper section.

With this construction it will be apparent, for a given speed of thedriving mechanism of the fuel pushing ram that with the lower sectionconnected to the upper section,.the

fuel displacement of the combined plunger area is available for pushingin the maximum quantity of fuel, and also when the lower section is,disconnected from the upper sec-.

tion it maintains its position at the inward.

end of its 'strokeand the upper section functions alone to feed the fuelinto the furnace. Thus, an extremely simple device isprovided which maybe easily controlled by the operator to vary the amount of fuel fed intothe combustion chamber different conditions.

The ram casing is provided with openings 54, and the lower wall of theupwardly opening recess 21 of the lower ram section is provided with anopening 56 which is located di rectly beneath the free end of thelatching pawl 22 when the pawl is in locking position. The opening 56 isadapted to register with the openings 54 when the lower sectionis intions without departing from the spirit thereof or the scope of theappended claims.

of the furnace to meet' either its extreme inward or retracted posi--What I claim is:

1. A fuel feeding ram for-a furnace having, twofuel ushing sectionsrelatively movable longitudinally, means for longitudinallyreciprocating one of said sections with relation to the other-to feedthe fuel, and means under the control of the operator for operativelyconnecting the other ram section to and disconnecting it from the firstmentioned section. A I

2. A fuel feeding ram for a furnace having, two fuel pushing sectionsrelatively movable longitudinally, and means under the control of theoperator to either reciprocate longitudinally both of said sectionstogether or to reciprocate longitudinally one ofv said sections whilethe other is held stationary.

3. A fuel feeding ram for a furnace having, two fuel pushing sectionsarran ed one above the other and relatively mova le longitudinally,means for longitudinally reciprocating the upper section with relationto the lower to feed the fuel, and means under the control of theoperator for opzratively connecting the lower section to andisconnecting it from the upper section.

4. A fuel feeding ram for a furnace having, two fuel pushing sectionsarranged one above the other and relatively movable longitudinally,means for longitudinally reciprocating the upper section with relationto the lower section to feed the fuel, and means adapted to becontrolled by the operator for operativel'y connecting the lower sectionto and disconnecting it from the upper section when the sections aresubstantially at the limit of their fuel feedin movement.

' 5. A fuel feeding ram or feeding fuel into a furnace having, two fuelpushing sections arranged one above the other and relativel movablelongitudinally, means for longitudiylol nally reciprocating the, uppersection with relation to the lower to feed the fuel into the furnace,cooperating shoulders on said sections adapted to engage during the fuelfeeding movement of the upper section to cause said sections to movetogether during said movementfand a ratchet device'adapted to be throwninto and outof operation by the operator to operatively connect thelower section to the upper section tocause the lower section to movewith the upper section during the retracting movement 0 the latter.

6. A fuel feeding ram for feeding fuel into a furnace, having two fuelpushing sections arranged one above the other and relatively movablelongitudinally, means for longitudinally reciprocating theupper one ofsaid sections with relation to the other to feed the fuel into thefurnace, and means under the control of the operator during theoperation of the upper section for operatively con necting the lowersection to and disconnectin it from the upper section.

. A fuel feeding ram for feeding fuel from a hopper into a furnace inwhich the ram casing is provided with an inlet opening for' 7 permlttingfuel to pass from the hopper into said casing, having two fuel pushingsections arranged one above the other and relatively movablelongitudinally, means for longitudinally reciprocating the upper sectionwith relation to the lower section to feed the fuel into the furnace,and means for operatively connecting the lower ram section to anddisconnecting it from the upper ram section, the two sections when atthe limit of their fuel feeding movement being positioned directly,beneath said opening in the ram cas- Gil ing, and the lower sectionbeing maintained in this position when disconnected.

8. A fuel feeding ram for feeding fuel into a furnace having two fuelfeeding sections relatively movable longitudinally, means forlongitudinally reciprocating one of said sections with relation to theother to feed the fuel into the furnace, and means under the control ofthe operator during the operation of said reciprocating section foroperativelyconnecting thereto and disconnecting therefrom the othersection.

In testimony whereof, I have signed my name to this specification this29th day of July, 1927.

AUGUST OLAF HANSEN.

